Results 11 to 20 of about 10,545 (194)
Proton dissociation properties of arylphosphonates: Determination of accurate Hammett equation parameters [PDF]
Journal of Pharmaceutical and Biomedical Analysis, 2017 Determination of the proton dissociation constants of several arylphosphonic acid derivatives was carried out to investigate the accuracy of the Hammett equations available for this family of compounds. For the measurement of the pKa values modern, accurate methods, such as the differential potentiometric titration and NMR-pH titration were used.
Gergő, Dargó +7 more
openaire +5 more sources
Effects of solvent and structure on the reactivity of 6-substituted nicotinic acids with diazodiphenylmethane in aprotic solvents [PDF]
Journal of the Serbian Chemical Society, 2009 The rate constants for the reactions of diazodiphenylmethane (DDM) with 6-substituted nicotinic acids in aprotic solvents at 30°C were determined. The obtained second order rate constants in aprotic solvents, together with literature data for benzoic and
Drmanić Saša Ž. +2 more
doaj +3 more sources
Transition from collisionless to collisional MRI [PDF]
, 2003 Recent calculations by Quataert et al. (2002) found that the growth rates of the magnetorotational instability (MRI) in a collisionless plasma can differ significantly from those calculated using MHD.
Chew G. F. +4 more
core +2 more sources
npj Computational Materials, 2023 The Hammett equation is commonly used to theoretically depict the remote electronic effects of substituents on catalytic activities of metal nodes of metal-organic frameworks (MOFs).
Zhenzhen Wang +4 more
doaj +1 more source
Compounds, 2023 The ability for density functional theory with the B3LYP functional with the lanl2dz basis set to predict the 1st (Wave 1) and 2nd (Wave 2) reductions of the diazine ring in a series of thirty-seven (37) 1,4-di-N-oxide quinoxaline-2-carboxamide ...
Faranak Pooladian +4 more
doaj +1 more source
Educación Química, 2019 Non-associative behavior of thiophenols is explained on the basis of Trouton’s rule, proton acceptor-donor cites and application of Hammett equation to the surface tension data of thiophenols.
R. Sanjeev, David Geelan, V. Jagannadham
doaj +1 more source
A Drift-Kinetic Analytical Model for SOL Plasma Dynamics at Arbitrary Collisionality [PDF]
, 2017 A drift-kinetic model to describe the plasma dynamics in the scrape-off layer region of tokamak devices at arbitrary collisionality is derived. Our formulation is based on a gyroaveraged Lagrangian description of the charged particle motion, and the ...
Jorge, R., Loureiro, N. F., Ricci, P.
core +1 more source
Química Nova, 2012 The present work deals with the study of the correlation of free-energy developed in a catalytic system for Suzuki coupling, by way of the Hammett equation.
Gilber Ricardo Rosa
doaj +1 more source
An Easy Synthesis of Monofluorinated Derivatives of Pyrroles from β-Fluoro-β-Nitrostyrenes
Molecules, 2021 The catalyst-free conjugate addition of pyrroles to β-Fluoro-β-nitrostyrenes was investigated. The reaction was found to proceed under solvent-free conditions to form 2-(2-Fluoro-2-nitro-1-arylethyl)-1H-pyrroles.
Alexander S. Aldoshin +3 more
doaj +1 more source
Journal of Saudi Chemical Society, 2020 A kinetic study of the reactions of potentially bioactive 2-amino-4-arylthiazoles with highly reactive 4,6-dinitrobenzofuroxan (DNBF) is reported herein in acetonitrile solution. The complexation reaction was followed by recording the UV–vis spectra with
Reem A. Alenzi +4 more
doaj +1 more source